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How to find gaps in sequential numbering in mysql?
... Note: This query doesn't work on temporary tables. My problem was the order number I was searching for gaps in is not distinct (the table stores order lines, so the order number they belong to repeats for each line). 1st query: 2812 rows in set (1 min 31.09 sec). Made another table by selecting...
What is the most effective way for float and double comparison?
...loating point numbers for depends on the context. Since even changing the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comp...
$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
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What are the correct version numbers for C#?
...ressions, target typed ?? and ?), covariant returns. Minor features: relax ordering of ref and partial modifiers, parameter null checking, lambda discard parameters, native ints, attributes on local functions, function pointers, static lambdas, extension GetEnumerator, module initializers, extending...
About Android image and asset sizes
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How do you reverse a string in place in C or C++?
... XOR swapping is slower than swapping via register on modern out-of-order processors.
– Patrick Schlüter
Aug 15 '11 at 17:42
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Visual List of iOS Fonts?
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Converting bool to text in C++
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This is a defensive programming technique that protects against hidden order-of-operations errors; i.e., how does this evaluate for all compilers?
1 == 2 ? "true" : "false"
compared to
(1 == 2) ? "true" : "false"
s...
What's the difference between dynamic (C# 4) and var?
...th dynamic are dynamically typed. This capability was added to the CLR in order to support dynamic languages like Ruby and Python.
I should add that this means that dynamic declarations are resolved at run-time, var declarations are resolved at compile-time.
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How to sort Map values by key in Java?
...t(key);
// do something
}
This will iterate across the map in natural order of the keys.
Longer answer
Technically, you can use anything that implements SortedMap, but except for rare cases this amounts to TreeMap, just as using a Map implementation typically amounts to HashMap.
For case...